Fix Digital Certificate Signature Not Available in Acrobat DC
Question details
The user needs to troubleshoot a missing digital certificate signature in Acrobat DC when attempting to sign a PDF.
- Product
- Acrobat DC
- Device & OS
- not provided
- Scenario
- Attempting to sign a PDF document using a previously created digital certificate in Acrobat DC.
- Observed behavior
- The digital certificate signature that was previously created does not appear as an available option for signing the PDF document.
Ensure that your digital certificate file (.pfx or .p12) is accessible on your local drive and that you have the correct password for it before configuring your digital IDs.
Verify and Select the Digital ID in Preferences
Check the digital ID settings to ensure your certificate is properly installed, trusted, and selected for signing.
Often, the digital certificate may have been unlinked or the software is failing to point to the correct file location. Re-verifying the identity settings can quickly restore access.
Go to 'Edit' > 'Preferences' on Windows or 'Acrobat' > 'Preferences' on macOS.
Select 'Signatures' from the Categories list on the left side of the Preferences window.
Locate the 'Identities & Trusted Certificates' section and click the 'More' button.
Ensure your certificate is listed under Digital IDs. If it is missing, click the 'Add ID' button to browse and import your existing certificate file.
Return to your document, open the 'Certificates' tool, click 'Digitally Sign', and select your restored digital ID from the prompt.
Check Windows Certificate Store (Windows Users)
If the software relies on the Windows Certificate Store, verify that the certificate is properly installed at the operating system level.
Add Digital Signatures to PDFs using WPS Office
WPS Office provides a robust, built-in PDF tool that makes importing digital certificates and signing documents incredibly simple and secure. It offers an intuitive interface to handle your PDF signature needs efficiently.
- 1. Open PDF in WPS Office: Launch WPS Office and open your PDF document using the PDF editor.
- 2. Access Protect Features: Navigate to the 'Protect' tab on the top ribbon.
- 3. Select Digital Signature: Click on 'Sign Document' or 'Digital Signature' from the toolbar options.
- 4. Import Your Certificate: Choose the option to add your digital ID file, locate your certificate, and enter your password.
- 5. Apply Signature: Click the area on the document where you want the signature to appear, then save your file.
Frequently Asked Questions
Why does my digital ID say it is invalid or expired?
Digital certificates have an expiration date for security reasons, much like a physical ID card. If it has expired, you will need to generate a new digital ID or obtain a renewed certificate from your Certificate Authority (CA).
Can I use a digital signature across different devices?
Yes. However, you must export your digital ID as a .pfx or .p12 file from the original device and import it into the PDF software's identity settings on your new device.
What is the difference between an electronic signature and a digital certificate?
An electronic signature is a digital representation of a handwritten signature (like an image or typed name), whereas a digital certificate is a cryptographically secure ID verified by a trusted authority to ensure document authenticity and prevent tampering.
How do I remove an old digital certificate from my PDF software?
Navigate to Preferences > Signatures > Identities & Trusted Certificates > More. Select the digital ID you want to remove and click 'Detach File' or 'Remove ID'.
